We're all for energy-efficiency, and NanoLeaf managed to pack quite a bit of it into one of the weirdest looking lightbulbs we've ever seen. With their LED bulb you get 30,000 hours of brightness equivalent to a standard 100W unit.

NanoLeaf's bulbs operate at a lower temperature thanks to using LEDs, but they also have "over-temperature protection" to avoid overheating under any circumstances. In addition to cool operation and great efficiency, they're also constructed without mercury or lead. If you're looking for a long-lasting lightbulb with great construction, bright light, and a frame that makes for a good conversation piece, you should check these out.